Received: from maia.hub.org (maia-5.hub.org [200.46.204.29]) by mail.postgresql.org (Postfix) with ESMTP id 7E655632C66 for ; Mon, 10 May 2010 16:30:39 -0300 (ADT) Received: from mail.postgresql.org ([200.46.204.86]) by maia.hub.org (mx1.hub.org [200.46.204.29]) (amavisd-maia, port 10024) with ESMTP id 10743-07 for ; Mon, 10 May 2010 19:30:32 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from glacier.frostconsultingllc.com (glacier.frostconsultingllc.com [69.36.227.170]) by mail.postgresql.org (Postfix) with ESMTP id 374D7632832 for ; Mon, 10 May 2010 16:30:32 -0300 (ADT) Received: from dsl081-245-111.sfo1.dsl.speakeasy.net ([64.81.245.111] helo=Sidney-Stratton.local) by glacier.frostconsultingllc.com with esmtpsa (TLSv1:CAMELLIA256-SHA:256) (Exim 4.69) (envelope-from ) id 1OBYgN-0005Kw-KS for pgsql-performance@postgresql.org; Mon, 10 May 2010 12:30:30 -0700 Message-ID: <4BE85ED3.4010008@agliodbs.com> Date: Mon, 10 May 2010 12:30:27 -0700 From: Josh Berkus User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US; rv:1.9.1b3pre) Gecko/20090223 Thunderbird/3.0b2 MIME-Version: 1.0 To: pgsql-performance@postgresql.org Subject: Re: 8K recordsize bad on ZFS? References: <4BE4ABC9.6040106@agliodbs.com> <4BE852CE.9020802@agliodbs.com> In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Virus-Scanned: Maia Mailguard 1.0.1 X-Spam-Status: No, hits=-1.9 tagged_above=-10 required=5 tests=BAYES_00=-1.9 X-Spam-Level: X-Archive-Number: 201005/41 X-Sequence-Number: 38625 Ivan, > Other things could have influenced your result - 260 MB/s vs 300 MB/s is > close enough to be influenced by data position on (some of) the drives. > (I'm not saying anything about the original question.) You misread my post. It's *87mb/s* vs. 300mb/s. I kinda doubt that's position on the drive. -- -- Josh Berkus PostgreSQL Experts Inc. http://www.pgexperts.com